Construction of wrenches.



N0. 699,7l9. Patented May l3, I902.

F. SEARLE.

CONSTRUCTION OF WRENCHES.

(Application filed Feb. 3, 1902-) (No Model.)

FJ Q; I] 1 F154 5 M17555 E5 J U r THE uoams vETERs co, Pwcn'oumo" vusumo uuuuuu c 'UNrrnn STATES FREDERICK SEARLE, OF \VORCESTER, MASSACHUSETTS, ASSIGNOR TO LORING GOES dz; COMPANY, INCORPORATED, OF WORCESTER, MAS- SACIIUSETTS, A CORPORATION OF MASSACHUSETTS.

CONSTRUCTION OF WRENCHES.

EPECJIFICA'IION forming part of Letters Patent No. 699,719, dated May 13, 1902.

Application filed February 3, 1902. Serial No. 92,288. (No model.)

To all whom it may concern:

Be it known that-I, FREDERICK SEARLE, a citizen of the United States, residing at \Vorcester, in the county of Worcester and State of Massachnsetts,have invented a new and useful Improvement in the Construction of \Vrenches, of which the following, together with the accompanying drawings, is a specification sufliciently full clear, and exact to enable persons skilled in the art to which this invention appertains to make and use the same.

My present invention relates to an improvement in the means for combining and securing the jaw-adjusting screw in connection with the collar or end of the handle-frame,

bar, and bar-shank, the objects being to render the structure more desirable and to provide a strong, neat, and efficientinterlocking attachment that can be manufactured and assembled with practical facility. I attain these objects by the construction illustrated in the accompanying drawings, wherein- Figure 1 represents aside View of a wrench embodying my invention, a portion being drawn in section to show the improved construction. Fig. 2 is a transverse section of the bar and screw-journal at the end of the handle at line TV W, Fig. 1. Fig. 3 is a trans verse section of the handle-frame atline XX 0n Figs. 1 and 4:. Fig. 4 is a longitudinal central section of the upper portion of the handle-frame at line Y Y on Fig. 2. Fig. 5 is a cross-section of the hearing or step at line Z Z on Fig. 2. Fig. 6 is a perspective view of the key-piece. Figs. '7, 8, and 9, respectively, show an end, top, and longitudinal section of the key-piece. Figs. 10, 11, and 12 show top and section views of the key-piece as made in two parts.

Referring to the drawings, A denotes the wrench-bar, having a fixed jaw a and handlesupporting shank. B indicates the movable jaw that slides on said bar, C the jaw-adjusting screw having the rosette thereon, the axis of the adjusting-screw being disposed so that said rosette 0' stands clear of the front face of the bar, which is unnotched at the back of the rosette, and D indicates the handleframe, which parts are of previously-known construction, excepting in the particulars hereinafter specified.

The screw-journal is made in T shape or with a groove 2 and flange 3. (See Fig. 1.)

In accordance with my present improvement 1 form in the top end of the handle frame or collar a T-shaped or undercut open cavity 5, extending forward from the baropening 6 to the position of the screw-bearing and. having a circular end concentric with the screw-axis and corresponding to the form of the screw-journal. The width of the upper part of said cavity corresponds with the diameter of the grooved portion 2 of the screw-journal, and the lower part of said cavity corresponds with the diameter of the flange portion of said screw-journal. Said T-shaped cavity can be formed or dressed out by means of a suitably-shaped millingoutter inserted at the baropening 6 and worked horizontally toward the position of the screw-bearing axis, forming an integral inwardly-overhanging lip 9. The cavity and screw-journal can be formed with square lips and shoulders, as indicated in Fig. 5, or with lips of other suitable form, as rounded lips and shoulders, as indicated by the outline m adjacent to Fig. 5.

Corresponding with the cavity 5 I provide a key-piece 10, of inverted-T cross-section (see Figs. 6, 7, 8, and 9) and having one end 11 formed to seat against the neck a. of the bar-sh ank adjacent to the handle-positioning shoulder 8, while its other end 12 is laterally concaved on two different circles, as at 13 and 14, to countermatch the periphery of the grooved and flanged portions of the screwjournal. The sides 15 of the key-piece 10 are formed to conntermatch and interlock with the undercut sides of the cavity, so that said key-piece can be slipped endwise into the cavity from the bar-opening 6 and to fill the cavity,witl1 the exception of the journal-bearing space.

When assembling the parts, the jaw 13 is first threaded onto the end of the screw, and the screw-journal is entered at the bar-opening (see dotted lines on Fig. 4) and is then passed laterally into its bearing-seat at the outer end of the cavity by movement in the direction Ice indicated by the arrow, the flanged portion 3 of the journal engaging beneath the inwardlyprojecting lip 9 of the hearing. The keypiece 10 is then inserted in the cavity, following the screw-journal, its upper part 13 overlying the flange 3, said upper part and the lip 9 confining the screw with sufficient looseness to permit free rotation of the screw, but interlocking the screw against endwise movement. The bar A is then passed through the jaw B and inserted in the handle-frame, the neck of the bar-shank filling the opening 6 and the end of the collar and top corner of the key-piece 1O resting against the shoulder 8, the handle-frame being then secured to the bar-shank in any suitable manner.

In some instances, if desired, the key-piece may be made in two parts, the upper and lower sections being separate, as illustrated in Figs. 10, 11, and 12. In such instances the upper portion of the key-piece and cavity may be slightly dovetailed to give the upper section better retention, although said section would be retained by the shoulder S and rosette end.

What I claim as of my invention, and de sire to secure by Letters Patent, is-

1. In a wrench, a wrench-handle collar provided with a screw-bearing seat having an integral inwardly-overhanging lip, a jaw-adjusting screw havinga flanged journal laterally interlocking beneath said lip, a countermatching key-piece embracing the journal opposite said lip, and means securing said keypiece in position, for the purpose set forth.

2. In a wrench, the handle-collar having an undercut screw-bearing seat with an open undercut cavity extending to the bar-space or collar-opening, into which the flanged screwjournal is interlocked by insertion at the collar-openingand transverse passage to its seat; and an interlocking follower or key-piece fitting said cavity and confining the screw-journal in its bearing, substantially as set forth.

3. The combination, of a wrench-handle frame provided in its collar end with an undercut cavity extending to the screw-axis, and having an inwardly overhanging lip and round end seat for receiving the journal; the jaw-adjusting screw having a T-shaped journal, and the insertible key-piece block provided with side lips adapted for engaging beneath said overhanging lip on the handleframe, and a transversely-concaved end with a lip countermatching the screw-journal, and a rear end matching the face of the Wrenchbar neck.

4:- In a screw-wrench comprising a wrenchhar having a straight body, a fixed jaw and a handle-supporting shank with'front and rear collar-positioning shoulders, and a movable jaw slidable on said bar; the jaw-adjusting screw having a rosette and a grooved and flanged step-journal, a handle-frame fitting upon said bar-shank against said shoulders, and having an inwardly-lipped bearing-seat for said screw-journal with an open channel having undercut sides extending thereto from the collar-opening, and a key piece, or pieces, fitting in said channel with the end thereof confined beneath the collar-positioning shoulder and against the neck of the bar-shank.

WVitness my hand this 30th day of January, 1902.

FREDERICK SEARLE. lVitnesses:

CHAS. H. BURLEIGH, ELLA P. BLENUs. 

